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dc.contributor.authorIyer, S.D.
dc.contributor.authorGupta, S.M.
dc.contributor.authorCharan, S.N.
dc.contributor.authorMills, O.P.
dc.date.accessioned2009-01-10T10:20:26Z
dc.date.available2009-01-10T10:20:26Z
dc.date.issued1999
dc.identifier.citationMarine Geology, Vol.158; 15-25p.
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/1752
dc.description.abstractReported is the occurrences of magnetite-rich spherules, Ti-rich particles and possibly nontronite recovered at 19 degrees S and 76 degrees E from the pelagic clay in the Central Indian Ocean Basin (CIOB). It is proposed that the magnetite spherules were formed as a result of volcanic activity in this part of the CIOB, while thw presence of nontronite suggests localized hydrothermal activity. The magnetic spherules and the associated materials are compared with similar occurrences 555 km to the north in the vicinity of the 76 degrees 30'E fracture zone. Considering radiolarian age dating of the sediment, the age of the volcano-hydrothermal episode responsible for the formation of these materials seems to be between 425 and 650 ka. It is inferred that there could have been widespread local volcanism in the CIOB
dc.language.isoen
dc.publisherElsevier
dc.rightsCopyright [1999]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subjecthydrothermal deposits
dc.subjectmetalliferous sediments
dc.subjectcosmic spherules
dc.subjectpelagic clay
dc.subjectvolcanism
dc.subjecthydrothermal activity
dc.titleVolcanogenic-hydrothermal iron-rich materials from the southern part of the Central Indian Ocean Basin
dc.typeJournal Article


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